Humidifier



FIG. 1 is a first perspective view of a humidifier showing the claimed new design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines immediately adjacent to the claimed portions are boundaries, all other broken lines are environmental structures, and all the broken lines form no part of the claimed design. 

CLAIM The ornamental design for a humidifier, as shown and described. 